Can you tell what is the circute #2 means

you have a misfire on cylinder # 2, check your plugs, if ok swap coils clear eng lite, run vehicle until check eng. lite comes back if code changes to a dirferent cylinder then you have a bad coil, if same code repeats then you need an injector, good luck.

YOU OBVOUSLY HAVE ANOTHER PROBLEM,UNFORTUNATELY SOMEONE NEEDS TO CHECK IT WHEN IT DOESNT START,,,LIKE ARE YOU GETTING SPARK,OR ARE YOU GETTING PROPER FUEL PRESSURE.,,IS THE SERVICE ENGINE SOON LIGHT ON ..IF SO WHAT DOES IT SAY.ID WOULD SAY ITS TIME FOR A NEW MECHANIC.LET HIM KEEP IT FOR A DAY OR 2 AND DRIVE IT.

Engine warning light

Illuminates when the ignition is switched on. It should extinguish as soon as the engine starts.
If it illuminates with the engine running, it indicates a malfunction with the engine management system. Have this checked as soon as possible.
If it flashes when driving, reduce the vehicle speed immediately until the light illuminates constantly. If it continues to flash, avoid heavy acceleration and high engine speed, stop the vehicle and have it checked immediately.
On some vehicles this light may be red - again stop the vehicle and seek assistance.
If it is safe to do so, try stopping the vehicle, switching off the engine, wait two minutes, then restarting the engine to reset the engine management system.
With the light illuminated, the vehicle is still safe to drive as long as no other faults are apparent with the engine. Have the vehicle checked by a dealer or garage as soon as possible to avoid any damage being caused to the catalytic converter

when the service engine soon light is illuminated in your vehicle, it means that the on board self diagnostic system has detected a fault either in the engine, transmission, or accessory controls. when this light is illuminated, it means that there is a code stored in the vehicle memory which can be extracted with a code reader. any garage should be able to do this for you. good luck!

your car has a service time/mileage computer inbuilt.when is says service is due thats exactly what it means GET IT SERVICED.....soon.

Go to carhelpsite.com it is free as long as you click on 2 of the ads at the website then your questions will be answered by an ASE certified mechanic,you don't have to buy or fill out anything on the ads,so help keep the site free.

This is a crankshaft position sensor. Usually mounted on top or side of the bell housing where the flywheel is contained. its not an expensive part, but a bit of a pain to access. This can cause intermittent engine stalling while driving even for just a moment, and it can eventually lead to a vehicle that wont start at all.

NEED CLUSTER CALL GM DEALERSHIP WITH VIN

The oil change wouldn't cause this problem. Just in-case, check the engine oil level.

There are many emission sensors in the car that will make the engine light come ON. Best way to find out what's going on is to have an auto-parts store hook up a engine code reader and tell you what the code means. Most auto-part store will do this for free.

replace the jumper in the connector for the shorting bar located near the ignition module.